JAVA-28935 Upgrade to Spring Boot 3 for Mysql (#15436)

persistence-modules/spring-boot-mysql/pom.xml

@@ -9,9 +9,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>parent-boot-3</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-boot-2</relativePath>
+        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>
@@ -43,7 +43,6 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
-                <version>2.1.5.RELEASE</version>
                 <executions>
                     <execution>
                         <goals>

persistence-modules/spring-boot-mysql/src/main/java/com/baeldung/boot/Application.java

@@ -1,9 +1,9 @@
 package com.baeldung.boot;
 
+import jakarta.annotation.PostConstruct;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
-import javax.annotation.PostConstruct;
 import java.util.TimeZone;
 
 @SpringBootApplication

persistence-modules/spring-boot-mysql/src/main/java/com/baeldung/boot/User.java

@@ -1,9 +1,10 @@
 package com.baeldung.boot;
 
 
+
 import org.springframework.data.annotation.CreatedDate;
 
-import javax.persistence.*;
+import jakarta.persistence.*;
 import java.util.Date;
 
 @Entity

persistence-modules/spring-boot-mysql/src/main/java/com/baeldung/boot/jpa/Employee.java

@@ -1,7 +1,7 @@
 package com.baeldung.boot.jpa;
 
 
-import javax.persistence.*;
+import jakarta.persistence.*;
 import java.io.Serializable;
 import java.time.LocalDate;
 import java.util.Date;

persistence-modules/spring-boot-mysql/src/main/resources/application.yml

@@ -1,6 +1,7 @@
 spring:
-  profiles:
-    active: "dev2"
+  config:
+    activate:
+      on-profile: "dev2"
   main:
     banner-mode: "off"
   jpa:
@@ -14,7 +15,9 @@ spring:
 ---
 
 spring:
-  profiles: "dev1"
+  config:
+    activate:
+      on-profile: "dev1"
   datasource:
     url: jdbc:mysql://localhost:3306/test?
     username: root
@@ -23,7 +26,9 @@ spring:
 ---
 
 spring:
-  profiles: "dev2"
+  config:
+    activate:
+      on-profile: "dev2"
   datasource:
     url: >-
          jdbc:mysql://localhost:3306/test_db?sslMode=VERIFY_CA&